规定了钢制压力容器的设计、制造、检验和验收要求的国家标准是()
A.JB 4708
B.GB 150
C.GB 50236
D.OB 50235
参考答案:B
―Excuse me. Which is the way to the museum?
―Sorry, I don’t know. This is my _____ time here.
A.first
B.second
C.two
D.one
原发甲状腺功能减退症最早出现异常的是()
A.血TSH
B.血总T3
C.血游离T3
D.血总T4
E.血游离T4